2017/10/29 by Giovanni Viola, Tobias Wenger, Jari M. Kinaret +3 · 1 citation
Engineering · Materials Science · Physics and Astronomy · #Condensed matter physics #Context (archaeology) #Graphene #Graphene research and applications #Impurity #Materials science #Nanotechnology #Optoelectronics #Physics #Plasmon #Plasmonic and Surface Plasmon Research #Quantum and electron transport phenomena #Quantum mechanics #Surface plasmon #cond-mat.mes-hall #physics.optics
paper · pdf · doi:10.1103/physrevb.97.085429
published as Phys. Rev. B 97, 085429 (2018) · 10 pages, 8 figures
arxiv created 2017/10/29 · openalex publication_date 2018/02/20 · arxiv updated 2018/02/28 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05
This work analyzes how impurities and vacancies on the surface of a graphene sample affect its optical conductivity and plasmon excitations. The disorder is analyzed in the self-consistent Green's function formulation and nonlocal effects are fully taken into account. It is shown that impurities modify the linear spectrum and give rise to an impurity band whose position and width depend on the two parameters of our model, the density and the strength of impurities. The presence of the impurity band strongly influences the electromagnetic response and the plasmon losses. Furthermore, we discuss how the impurity-band position can be obtained experimentally from the plasmon dispersion relation and discuss this in the context of sensing.